Teams should start by inventorying all privileged access across human and non-human identities, including accounts, roles, and entitlements. That baseline shows where excessive access exists and where controls are missing. Once the inventory is complete, organisations can prioritize time bound access, policy refinement, automation, and monitoring in a sequence that supports both security and audit readiness.
Start with a complete privileged access inventory
The first practical step is to build a reliable inventory of every privileged path that can affect cardholder-data systems, admin consoles, cloud resources, and supporting tooling. That inventory should include human administrators, shared admin accounts, service accounts, API-driven automations, roles, and entitlement chains so you can see where privilege actually exists, not just where policy says it should exist.
A useful baseline is to tie each privileged path to an owner, system, business purpose, and access method. That lets teams separate legitimate operational access from legacy access that no one can justify, which is usually where excess privilege and audit gaps start to accumulate.
For non-human access, use Ultimate Guide to NHIs as the broader reference for discovery, governance, and lifecycle issues that often hide privileged access in plain sight.
Where privileged access is already suspected to be overbroad, a broader case-based view can help teams understand how misconfigured access becomes real exposure, as shown in Azure Key Vault privilege escalation exposure and BeyondTrust API key breach.
Turn the inventory into a control sequence
Once the baseline exists, teams can decide which access paths need immediate containment, which can move to time-bound access, and which require policy redesign. The point is not to automate everything at once, but to sequence controls so the highest-risk privileged paths are reduced first and the remaining ones become easier to govern and review.
That sequence usually starts with access that is persistent, shared, or difficult to attribute, then moves to stronger approval, tighter scoping, and better monitoring. In practice, a clean inventory makes it much easier to enforce least privilege, shorten access duration, and eliminate roles or entitlements that were never revisited after they were created.
For payment environments, the compliance driver is explicit. PCI DSS v4.0 makes least privilege and the treatment of system and application accounts part of the control design, so inventory is the starting point for demonstrating that access is intentionally granted rather than inherited by default.
When the privileged paths include machine access, the same sequencing logic applies to non-human identities because tokens, keys, certificates, and service accounts often carry the same or greater blast radius than human admins.
What teams should verify before they move to enforcement
What to verify: Confirm that the inventory includes direct admins, indirect privilege through groups and roles, and non-human actors that can reach in-scope systems. If you cannot trace a privileged action back to an accountable owner and a clearly defined use case, treat that access as a candidate for review or removal.
Decision rule: If a privileged path is permanent, broadly scoped, or shared across multiple operators, do not start by tuning alerts. Reduce the access first, then add monitoring around the remaining exceptions. If the path is time-sensitive or operationally critical, design a controlled elevation workflow before expanding it further.
Practitioner takeaway: The first win is not tighter policy language, it is a trustworthy map of who and what can exercise privilege today, because every later control depends on that baseline being complete.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack surface, CIS Controls v8, NIST CSF 2.0, NIST SP 800-63 and NIST Zero Trust (SP 800-207) set the technical controls, and PCI DSS v4.0 define the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| PCI DSS v4.0 | 7 — Restrict Access by Business Need to Know | Privileged access prep must start with least-privilege inventory and scoping for in-scope payment systems. |
| 8.6 — System and Application Accounts | System and application accounts are part of privileged access scope and must be identified early. | |
| Recommendation — Map privileged accounts and entitlements to business need, then remove excess access before enforcing stronger controls. Inventory system and application accounts with login capability and place them under explicit control. | ||
| CIS Controls v8 | 6 — Access Control Management | Access control management directly supports inventorying privileged access and reducing excess entitlements. |
| 5 — Account Management | Account management applies to identifying, owning, and reviewing privileged human and non-human accounts. | |
| Recommendation — Inventory privileged access, then tighten account and entitlement governance to least privilege. Document account ownership and review privileged accounts on a defined schedule. | ||
| OWASP Non-Human Identity Top 10 | NHI-01 — Discovery and Inventory | Non-human privileged access must be discovered and inventoried before access controls can be prioritized. |
| NHI-03 — Privilege and Access Governance | Privileged access control preparation is fundamentally about reducing excess privilege and governing entitlements. | |
| Recommendation — Discover all non-human identities and map their privileges before changing access policy. Review entitlements for excessive privilege and enforce least privilege on all privileged paths. | ||
| NIST CSF 2.0 | PR.AA — Identity Management, Authentication, and Access Control | The answer centers on identifying privileged access paths so access control can be designed and enforced. |
| GV.OC — Organizational Context | PCI DSS preparation depends on defining in-scope systems, roles, and accountability boundaries. | |
| Recommendation — Establish identity and access inventories first, then apply stronger controls to privileged paths. Define the scope, owners, and business context for privileged access before control rollout. | ||
| NIST SP 800-63 | AAL — Authentication Assurance Level | Privileged access programmes depend on strong authentication decisions for high-impact accounts. |
| Recommendation — Set stronger authentication requirements for privileged access paths after inventorying them. | ||
Related resources from NHI Mgmt Group
- How should organisations implement privileged access controls for PCI DSS environments?
- How should security teams run access reviews for non-human identities?
- How should security teams govern non-human identities that have persistent access?
- How should security teams govern API keys used for generative AI access?
